Map of the St. Louis area showing the position and track of the aircraft described in the post.

🇺🇸 N706AL - Boeing 737MAX 9 - Alaska Airlines ASA9677/AS9677, Baltimore/Washington Thurgood Marshall (BWI) to San Diego (SAN) - 4.4 mi away @ 35000 ft, heading W at 480 mph. Spotted 3x before! [12:33:26 PM CDT] #A96AE3 #N706AL #B39M #ALASKA #ASA9677 #AS9677 #ADSB #ADSBbot